@book{OPUS4-5053,
  title     = {Proceedings of the 5th Ph.D. Retreat of the HPI Research School on Service-oriented Systems Engineering},
  editor    = {Christoph Meinel and Hasso Plattner and J{\"u}rgen Roland Friedrich D{\"o}llner and Mathias Weske and Andreas Polze and Robert Hirschfeld and Felix Naumann and Holger Giese},
  isbn      = {978-3-86956-129-5},
  year      = {2011},
}